Respond to navigation events

You can use the Screen navigation methods to create a BlackBerry®
device application.
If your existing BlackBerry device application
implements the TrackwheelListener interface, update your
BlackBerry device application
to use the Screen navigation methods.

Import the net.rim.device.api.ui.Screen
class.

Manage navigation events by extending the net.rim.device.api.ui.Screen class (or one of its subclasses) and overriding the following navigation methods: